Car-underframe.



PATENTED MAY l2, 1908.

- V. M. SUMMA.

GAR UNDBRPRAMB. APPLICATION FILEDl JAN. 18,'190-8.

l UNITED' STATES PATENT OFFICE. VICTOR M. SUMMA, OF ST. LOUIS, lTIISSOURI, ASSIGNOR TO AMERICAN CAR & FOUNDRY COMPANY, OF ST. LOUIS, MISSOURI, Av CORPORATION OF NEW JERSEY.

OAR-fUNDERFRAME Patented May 12, 1908.

Application fled January 18, 1908. Serial No. 411,449.

new. and useful Improvement in Car-Under-l 4frames, of which the following is a full,

clear, andjexlact description, such as will enable others skilled in theart to which it y appertains tomake and use the same, refer- 10.

ence being had to the accompanying drawlnlglshorrning part of this specification, in w c `.Figure is a transverse sectional view of aT car. nnderframe constructed yin Iaccordance with mv mvent1on,"the cross bearer bemg Vshown in elevation: Fig. 2 is a side elevation ofa portion, of the underframe; and Fig. 3 is a sectiqnalviewtakenfon the line 3-3 of Fig; 1. a i his invention relates to car underframes,

- vide a car underframe of novel constructlon.

. vReferring to the drawings which illustrate the preferred form of my invention, 1 designates channel-sha edcentersills of anunderframe arrange withtheir horizontal legs projecting outwardly. The side sills are designed to carr the major portion of the load and each of sald sills'consists of a plate 'rder comprisin'ga vertically ydisposed web atel 2 ovided at its upper edge with a top (ihord 3 o Z-sh'a e in cross sectionand at its loweredge wit abottom chord 4 of L-shape in cross section, the top chord referably consisting of a commercially ro led Z-bar and the bottom. chord consistin of a'commercially rolled angle. The we plate 2 is con- 1 nected to the inside face of the vertical web of the yZ-bar 3 and .to the' inside face of the vertical leg of the angle 4, the horizontal leg of said: angle projecting inwardly and tinuous compression member 7 that extends over the center sills 1 and has its ends bent downwardly and secured to the gusset plates 6 and a straight continuous tension member 8 that extends underneath the center sills. The compression and tension members 7 and 8 of the cross bearer preferably consist of commercially rolled an les arranged with rtheir horizontal legs or anges projecting in the same direction. Web plates 9 are secured to the vertical legs of the tension and compression members of the cross bearer intermediate the side sills and .center sills, and a diaphragm 10 that is arranged between the center sills is also secured to said tension and compression members, said diaphragm being provided with side flanges 10'l that are con- .nected to the webs of the center sills, as

shown in Fig. 1.

The center floorsupport or Stringer 11 is divided at the cross bearer and the ends of the sections ywhich'form said support rest on angle iron brackets 12 secured to the opposite sides of the diaphragm 10 between the center sills. The intermediate floor suports orlstringers 13 rest upon the horizontal eg or -flange of the compression member 7 of 'the cross bearer .and are secured thereto by bolts or other suitable fastening devices.

A Having thus described my invention; `what I claim as new and desire to secure by Letside sills, a continuous flanged member pass-- ing underneath the center sills and connected to the side sills above their lower edges, a

second continuous flanged member passing over the center sills and having its ends connected to the side sills adjacent the points where the member first referred to is connected to the side sills, and web plates con nected to the vertical flancos of said continuous members; substantially as described.

A car underframe, comprising side sills designed to\ carry the major portion of the load and provided with inwardly projecting gusset plates, comparatively shallow center sills, a straight "continuous rolled member passing underneath the center sill and connected to said gusset plates above the lower edges ofthe side sills, anda second continuous rolled member passing over the center sills andi having its ends deflected down-- projecting inwardly from the side sills, a eon tinuous member passing underneath the center sills and connected to said gussetgplates above the lower edges of the side sills, and a connected to said lside sills, a diaphragm arsecond continuous member passing overV the center sills and having its ends deflected downwardly and connected to `said gusset plates; substantially as described. l

' 5. A car un derframe, comprising deep side sills, center sills,-gusset plates projecting inwardly lfrom the side sills, a straight continuzous flanged member passin underneath the center sills and `connecte to saidgusset plates, a second continuous flanged member passing over the center sills and having its ends `defiected and connected tosaid gusset plates, web plates connected to the vertical egs of said members between the center sills and side sills, and a diaphragm arranged between the center sillsA and secured to the vertical legs of said members; substantially as described.

6. A car underframe provided with plate i .outwardly projecting fianges of the Zl-bars of the side si s; substantially as described.

7. A car'underframe,'comprismg built-up plate girder side sills provided with top chords of Z-shape in .cross section, center sills, a continuous member passing underneath the center sills and connected at its opposite ends to the side sills, a second continuous member passing over the cen-ter sills'a'nd ranged between the center sills and connected to said members, floor supports carried by the outwardly projecting flanges ofthe Z-shaped members of the side sills, and a cen'ter floor support connected to brackets on said diaphragm; substantially as described.

` In testimony whereof I hereunto afliX myA signature in the presence of two witnesses,

this fifteenth day of January, 1908.

VICTOR M. SUMMA.

Witnesses:

WELLs L. CHURCH, GEORGE B. BAKEWELL. 

